Improvement in pill-machines



H. E. CHAPMAN.

Pil! Machine.

Patented May 2o, 1856.

N. Firms. PhowLnhagnphJr. wnsmngwn. D. C,

UNITED STATES PATENT OFFICE.

HENRY E. CHAPMAN, OF ALBANY, NEW YORK.

IMPROVEMENT IN PILL-MACHINES.

Specification forming part of Letters Patent No. 14,904, dated May 20. 1856. N

To all whom mla/.z/ concer-n,.-

Beit known that I, 'HENRY E. CHAPMAN, of the city and county of Albany, and State of New York, have invented a new and useful Machine for Making Pills; and I do hereby declare the following to be a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in Which- Figure lis a longitudinal section; Fig. 2, a plan, and Fig. 3 a transverse section at m x, in which- A is the frame; B B, two revolvingcylinders, of different diameters, having semicii" cular grooves corresponding with each other turned in their peripheries; C, fecding-oylinder, having a nose-piece perforated to correspond with the grooves in the cylinders B B; D D, cog-wheels between cylinders B B; E E,

`driving-wheel and pinion; F, bell-crank le ver for feedgear; G, pawl; H, ratchet-wheel; I, feed-screw; J, piston or follower to feedingcylinder; K, knife; L, driving-shaft, on which are two pins, Z Z', for forcing down the knife; M, vdriving -crank; N, bed-piece, having a grooved face to correspond with grooves in cylinders B B, and which is fitted closely to the smaller cylinder,having its face toward and curved to the radius ofthe larger cylinder; O O, springs for raising the knife; P P, guides for the knife.

In operating the machine the feeding-cylinder is filled with the pill composition. When motion is given to the driving-shaft L, the composition is forced through the perforations of the nose-piece of the feeding-cylinder by means of the bell-crank lever F, pawl G, ratchet-wheel H, feed-screw I, the follower J, and their attachments. When a'sufcient quantity has been forced through, the knife K is forced .down by the pins Z Z striking it on the top, which, as it passes the perforations, cuts off small cylindrical pieces of the composition, which fall into the grooves of the cylinders B B,whose surfaces, being driven at different rates of speed by means of the cogwheels D, give to the pills a rolling motion and shape them into aspherical form, the bedpiece N serving the purpose of retaining the rolling motion of the pills and smoothing down any remaining inequalities after they have passed from between the cylinders. After the knife K has made its cut, and the pins ZZ have passed from their point of contact with it, it is carried up to its place by means of the springs O O.

Having thus described the construction and operation of my machine, what I claim as my invention, and desire to secure by Letters Patent, is-

The feeding-cylinder C, the knife K, the grooved bedpiece N, and the two grooved cylinders B B, having their surfaces driven at different rates of speed, all substantially as herein described, and for the purposes set forth.

HENRY OHAPM AN.

Witnesses:

H. L. DICKERMAN, WILLIAM H. Low. 

